Hi
pgsql-general-owner@xxxxxxxxxxxxxx wrote on 02/01/2010 07:36:55 AM:
> Good Evening, Good Morning Wherever you are whenever you may be reading this.
>
>
snip
>
> count1 | count2 | count3
> -------------------------------
> 2 2 4
>
> Can this be done with ONE SQL STATEMENT? touching the database only ONE time?
You can do the following:
SELECT
(SELECT COUNT(distinct model) FROM inventory WHERE modified >= '2010-02-01') AS "COUNT_1",
(SELECT COUNT(distinct model) FROM inventory WHERE modified >= '2010-01-20') AS "COUNT_2",
(SELECT COUNT(distinct model) FROM inventory WHERE modified >= '2010-01-01') AS "COUNT_3"
;
PostgreSQL allows sub-queries in the select list as long as the sub-query returns one column
Job done
> Please let me know.
>
> Thanx> :)
> NEiL
>
Chris Ellis
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